René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"test_repl's test_no_memory: AssertionError: -6 not found in (1, 120)","articleBody":"# Bug report\n\n### Bug description:\n\nOne of my PRs (https://github.com/python/cpython/pull/118283) started failing (https://github.com/python/cpython/actions/runs/8843882336?pr=118283) with this. Investigating, I can reproduce it locally on `main`, although I don't know why the CI passes on `main`. \n\nOS: macOS Sonoma 14.4.1, M2.\n\n## To reproduce\n\n```sh\ngit clone https://github.com/python/cpython\ncd cpython\n./configure --with-pydebug \u0026\u0026 make -j10\n./python.exe Lib/test/test_repl.py\n```\n\n## Actual result\n\n```pytb\n.....F.\n======================================================================\nFAIL: test_no_memory (__main__.TestInteractiveInterpreter.test_no_memory)\n----------------------------------------------------------------------\nTraceback (most recent call last):\n  File \"/private/tmp/cpython/Lib/test/test_repl.py\", line 86, in test_no_memory\n    self.assertIn(p.returncode, (1, 120))\n    ~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^\nAssertionError: -6 not found in (1, 120)\n```\n\nPrinting `output` from the test:\n\n```\nPython 3.13.0a5+ (bisect/good-e16062dd3428a5846344e0a8c6ee2f352d34ce1b-1-gdf73179048:df73179048, A) [Clang 15.0.0 (clang-1500.3.9.4)] on darwin\nType \"help\", \"copyright\", \"credits\" or \"license\" for more information.\n\u003e\u003e\u003e \u003e\u003e\u003e \u003e\u003e\u003e Traceback (most recent call last):\n  File \"\u003cstdin\u003e\", line 1, in \u003cmodule\u003e\n    1/0\n    ~^~\nZeroDivisionError: division by zero\n\u003e\u003e\u003e After the exception.\n\u003e\u003e\u003e object address  : 0x102f8b9a0\nobject refcount : 3\nobject type     : 0x102b831a8\nobject type name: MemoryError\nobject repr     :\nlost sys.stderr\nobject address  : 0x102f8b930\nobject refcount : 3\nobject type     : 0x102b831a8\nobject type name: MemoryError\nobject repr     :\nlost sys.stderr\nobject address  : 0x102f8b9a0\nobject refcount : 3\nobject type     : 0x102b831a8\nobject type name: MemoryError\nobject repr     :\nlost sys.stderr\nobject address  : 0x102f8b930\nobject refcount : 3\nobject type     : 0x102b831a8\nobject type name: MemoryError\nobject repr     :\nlost sys.stderr\nobject address  : 0x102f8b9a0\nobject refcount : 3\nobject type     : 0x102b831a8\nobject type name: MemoryError\nobject repr     :\nlost sys.stderr\nobject address  : 0x102f8b930\nobject refcount : 3\nobject type     : 0x102b831a8\nobject type name: MemoryError\nobject repr     :\nlost sys.stderr\nobject address  : 0x102f8b9a0\nobject refcount : 3\nobject type     : 0x102b831a8\nobject type name: MemoryError\nobject repr     :\nlost sys.stderr\nobject address  : 0x102f8b930\nobject refcount : 3\nobject type     : 0x102b831a8\nobject type name: MemoryError\nobject repr     :\nlost sys.stderr\nobject address  : 0x102f8b9a0\nobject refcount : 3\nobject type     : 0x102b831a8\nobject type name: MemoryError\nobject repr     :\nlost sys.stderr\nobject address  : 0x102f8b930\nobject refcount : 3\nobject type     : 0x102b831a8\nobject type name: MemoryError\nobject repr     :\nlost sys.stderr\nobject address  : 0x102f8b9a0\nobject refcount : 3\nobject type     : 0x102b831a8\nobject type name: MemoryError\nobject repr     :\nlost sys.stderr\nobject address  : 0x102f8b930\nobject refcount : 3\nobject type     : 0x102b831a8\nobject type name: MemoryError\nobject repr     :\nlost sys.stderr\nobject address  : 0x102f8b9a0\nobject refcount : 3\nobject type     : 0x102b831a8\nobject type name: MemoryError\nobject repr     :\nlost sys.stderr\nobject address  : 0x102f8b930\nobject refcount : 3\nobject type     : 0x102b831a8\nobject type name: MemoryError\nobject repr     :\nlost sys.stderr\nobject address  : 0x102f8b9a0\nobject refcount : 3\nobject type     : 0x102b831a8\nobject type name: MemoryError\nobject repr     :\nlost sys.stderr\nobject address  : 0x102f8b930\nobject refcount : 3\nobject type     : 0x102b831a8\nobject type name: MemoryError\nobject repr     :\nlost sys.stderr\nFatal Python error: _Py_Dealloc: Deallocator of type '_thread._localdummy' raised an exception\nPython runtime state: finalizing (tstate=0x0000000102bf3c40)\n\nCurrent thread 0x0000000201f77ac0 (most recent call first):\n  \u003cno Python frame\u003e\n```\n\n## Expected result\n\nIt passes with `v3.13.0a5`, where `output` is:\n\n```\nPython 3.13.0a5 (tags/v3.13.0a5:076d169ebb, Apr 26 2024, 22:13:38) [Clang 15.0.0 (clang-1500.3.9.4)] on darwin\nType \"help\", \"copyright\", \"credits\" or \"license\" for more information.\n\u003e\u003e\u003e \u003e\u003e\u003e \u003e\u003e\u003e Traceback (most recent call last):\n  File \"\u003cstdin\u003e\", line 1, in \u003cmodule\u003e\n    1/0\n    ~^~\nZeroDivisionError: division by zero\n\u003e\u003e\u003e After the exception.\n\u003e\u003e\u003e object address  : 0x100f63a10\nobject refcount : 3\nobject type     : 0x100b5f1a8\nobject type name: MemoryError\nobject repr     : \nlost sys.stderr\nobject address  : 0x100f639a0\nobject refcount : 3\nobject type     : 0x100b5f1a8\nobject type name: MemoryError\nobject repr     : \nlost sys.stderr\nobject address  : 0x100f63a10\nobject refcount : 3\nobject type     : 0x100b5f1a8\nobject type name: MemoryError\nobject repr     : \nlost sys.stderr\nobject address  : 0x100f639a0\nobject refcount : 3\nobject type     : 0x100b5f1a8\nobject type name: MemoryError\nobject repr     : \nlost sys.stderr\nobject address  : 0x100f63a10\nobject refcount : 3\nobject type     : 0x100b5f1a8\nobject type name: MemoryError\nobject repr     : \nlost sys.stderr\nobject address  : 0x100f639a0\nobject refcount : 3\nobject type     : 0x100b5f1a8\nobject type name: MemoryError\nobject repr     : \nlost sys.stderr\nobject address  : 0x100f63a10\nobject refcount : 3\nobject type     : 0x100b5f1a8\nobject type name: MemoryError\nobject repr     : \nlost sys.stderr\nobject address  : 0x100f639a0\nobject refcount : 3\nobject type     : 0x100b5f1a8\nobject type name: MemoryError\nobject repr     : \nlost sys.stderr\nobject address  : 0x100f63a10\nobject refcount : 3\nobject type     : 0x100b5f1a8\nobject type name: MemoryError\nobject repr     : \nlost sys.stderr\nobject address  : 0x100f639a0\nobject refcount : 3\nobject type     : 0x100b5f1a8\nobject type name: MemoryError\nobject repr     : \nlost sys.stderr\nobject address  : 0x100f63a10\nobject refcount : 3\nobject type     : 0x100b5f1a8\nobject type name: MemoryError\nobject repr     : \nlost sys.stderr\nobject address  : 0x100f639a0\nobject refcount : 3\nobject type     : 0x100b5f1a8\nobject type name: MemoryError\nobject repr     : \nlost sys.stderr\nobject address  : 0x100f63a10\nobject refcount : 3\nobject type     : 0x100b5f1a8\nobject type name: MemoryError\nobject repr     : \nlost sys.stderr\nobject address  : 0x100f639a0\nobject refcount : 3\nobject type     : 0x100b5f1a8\nobject type name: MemoryError\nobject repr     : \nlost sys.stderr\nobject address  : 0x100f63a10\nobject refcount : 3\nobject type     : 0x100b5f1a8\nobject type name: MemoryError\nobject repr     : \nlost sys.stderr\nobject address  : 0x100f639a0\nobject refcount : 3\nobject type     : 0x100b5f1a8\nobject type name: MemoryError\nobject repr     : \nlost sys.stderr\n```\n\nThe main difference is the failure includes this:\n\n```\nFatal Python error: _Py_Dealloc: Deallocator of type '_thread._localdummy' raised an exception\nPython runtime state: finalizing (tstate=0x0000000102bf3c40)\n\nCurrent thread 0x0000000201f77ac0 (most recent call first):\n  \u003cno Python frame\u003e\n```\n\n\n## Bisecting\n\n```\ndf7317904849a41d51db39d92c5d431a18e22637 is the first bad commit\ncommit df7317904849a41d51db39d92c5d431a18e22637\nAuthor: mpage \u003cmpage@meta.com\u003e\nDate:   Mon Apr 8 07:58:38 2024 -0700\n\n    gh-111926: Make weakrefs thread-safe in free-threaded builds (#117168)\n\n    Most mutable data is protected by a striped lock that is keyed on the\n    referenced object's address. The weakref's hash is protected using the\n    weakref's per-object lock.\n\n    Note that this only affects free-threaded builds. Apart from some minor\n    refactoring, the added code is all either gated by `ifdef`s or is a no-op\n    (e.g. `Py_BEGIN_CRITICAL_SECTION`).\n\n Include/cpython/weakrefobject.h                |   8 +\n Include/internal/pycore_interp.h               |   7 +\n Include/internal/pycore_object.h               |  40 +-\n Include/internal/pycore_pyatomic_ft_wrappers.h |   5 +\n Include/internal/pycore_weakref.h              |  73 +++-\n Lib/test/test_sys.py                           |   8 +-\n Lib/test/test_weakref.py                       |  19 +\n Modules/_sqlite/blob.c                         |   5 +-\n Modules/_sqlite/connection.c                   |   4 +-\n Modules/_ssl.c                                 |  13 +-\n Modules/_ssl/debughelpers.c                    |   6 +-\n Modules/_weakref.c                             |  42 +-\n Modules/clinic/_weakref.c.h                    |  20 +-\n Objects/dictobject.c                           |   8 +-\n Objects/typeobject.c                           |  12 +-\n Objects/weakrefobject.c                        | 537 ++++++++++++++-----------\n Python/pystate.c                               |   9 +\n 17 files changed, 490 insertions(+), 326 deletions(-)\nbisect found first bad commit\n```\n\nPR: https://github.com/python/cpython/pull/117168\nIssue: https://github.com/python/cpython/pull/111926\n\nThe PR was merged three weeks ago and the CI is passing.\n\n---\n\nOn my PR (https://github.com/python/cpython/actions/runs/8843882336?pr=118283), free-threaded builds pass, but regular ones fail. Ubuntu and macOS fail with:\n\n```pytb\nAssertionError: -6 not found in (1, 120)\n```\n\nWindows with:\n\n```pytb\nAssertionError: 3221225477 not found in (1, 120)\n```\n\n3221225477 seems to be 0xc0000005 `STATUS_ACCESS_VIOLATION`.\n\n\n\n### CPython versions tested on:\n\n3.13\n\n### Operating systems tested on:\n\nmacOS\n\n\u003c!-- gh-linked-prs --\u003e\n### Linked PRs\n* gh-118334\n* gh-118338\n* gh-130811\n* gh-130921\n\u003c!-- /gh-linked-prs --\u003e\n","author":{"url":"https://github.com/hugovk","@type":"Person","name":"hugovk"},"datePublished":"2024-04-26T19:24:23.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":8},"url":"https://github.com/118331/cpython/issues/118331"}